src/include/capi/cef_audio_handler_capi.h

// Copyright (c) 2020 Marshall A. Greenblatt. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
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//    * Redistributions in binary form must reproduce the above
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// ---------------------------------------------------------------------------
//
// This file was generated by the CEF translator tool and should not edited
// by hand. See the translator.README.txt file in the tools directory for
// more information.
//
// $hash=430877d950508a545d0baa18c8c8c0d2d183fec4$
//

#ifndef CEF_INCLUDE_CAPI_CEF_AUDIO_HANDLER_CAPI_H_
#define CEF_INCLUDE_CAPI_CEF_AUDIO_HANDLER_CAPI_H_
#pragma once

#include "include/capi/cef_base_capi.h"
#include "include/capi/cef_browser_capi.h"

#ifdef __cplusplus
extern "C" {
#endif

///
// Implement this structure to handle audio events.
///
typedef struct _cef_audio_handler_t {
  ///
  // Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  // Called on the UI thread to allow configuration of audio stream parameters.
  // Return true (1) to proceed with audio stream capture, or false (0) to
  // cancel it. All members of |params| can optionally be configured here, but
  // they are also pre-filled with some sensible defaults.
  ///
  int(CEF_CALLBACK* get_audio_parameters)(struct _cef_audio_handler_t* self,
                                          struct _cef_browser_t* browser,
                                          cef_audio_parameters_t* params);

  ///
  // Called on a browser audio capture thread when the browser starts streaming
  // audio. OnAudioSteamStopped will always be called after
  // OnAudioStreamStarted; both functions may be called multiple times for the
  // same browser. |params| contains the audio parameters like sample rate and
  // channel layout. |channels| is the number of channels.
  ///
  void(CEF_CALLBACK* on_audio_stream_started)(
      struct _cef_audio_handler_t* self,
      struct _cef_browser_t* browser,
      const cef_audio_parameters_t* params,
      int channels);

  ///
  // Called on the audio stream thread when a PCM packet is received for the
  // stream. |data| is an array representing the raw PCM data as a floating
  // point type, i.e. 4-byte value(s). |frames| is the number of frames in the
  // PCM packet. |pts| is the presentation timestamp (in milliseconds since the
  // Unix Epoch) and represents the time at which the decompressed packet should
  // be presented to the user. Based on |frames| and the |channel_layout| value
  // passed to OnAudioStreamStarted you can calculate the size of the |data|
  // array in bytes.
  ///
  void(CEF_CALLBACK* on_audio_stream_packet)(struct _cef_audio_handler_t* self,
                                             struct _cef_browser_t* browser,
                                             const float** data,
                                             int frames,
                                             int64 pts);

  ///
  // Called on the UI thread when the stream has stopped. OnAudioSteamStopped
  // will always be called after OnAudioStreamStarted; both functions may be
  // called multiple times for the same stream.
  ///
  void(CEF_CALLBACK* on_audio_stream_stopped)(struct _cef_audio_handler_t* self,
                                              struct _cef_browser_t* browser);

  ///
  // Called on the UI or audio stream thread when an error occurred. During the
  // stream creation phase this callback will be called on the UI thread while
  // in the capturing phase it will be called on the audio stream thread. The
  // stream will be stopped immediately.
  ///
  void(CEF_CALLBACK* on_audio_stream_error)(struct _cef_audio_handler_t* self,
                                            struct _cef_browser_t* browser,
                                            const cef_string_t* message);
} cef_audio_handler_t;

#ifdef __cplusplus
}
#endif

#endif  // CEF_INCLUDE_CAPI_CEF_AUDIO_HANDLER_CAPI_H_